Romans 8:29

For whom he foreknew, he also foreordained to be conformed to the likeness of his Son, so that he might be the eldest of a great brotherhood;

Hebrews 12:23

to the festal assemblage and church of the firstborn, registered in heaven, to a Judge who is God of all, to the spirits of just men made perfect,

Treasury of Scripture Knowledge

Summary

All the firstling males that come of thy herd and of thy flock thou shalt sanctify unto the LORD thy God: thou shalt do no work with the firstling of thy bullock, nor shear the firstling of thy sheep.

The firstling

Bible References

The firstling

Romans 8:29
For whom he foreknew, he also foreordained to be conformed to the likeness of his Son, so that he might be the eldest of a great brotherhood;
Hebrews 12:23
to the festal assemblage and church of the firstborn, registered in heaven, to a Judge who is God of all, to the spirits of just men made perfect,